feat: inplace updates

[18alantom]

This is a bad idea.

Use docker container commit for updates that don't span multiple Benches (containers). This allows skipping docker build. More details later.

• [x] happy path, if update doesn't fail it will work
• [x] failure handling, if update fails restore last working image (⚠️ not tested ⚠️)
• [x] UI
• [x] Docs: https://frappecloud.com/docs/in-place-updates
• [x] Final test

https://github.com/frappe/agent/pull/121

depends on https://github.com/frappe/press/pull/2098

[18alantom]

https://github.com/frappe/press/issues/545